| 1 | /* Reentrant versions of execution system calls. These |
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| 2 | implementations just call the usual system calls. */ |
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| 3 | |
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| 4 | #include <reent.h> |
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| 5 | #include <unistd.h> |
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| 6 | #include <sys/wait.h> |
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| 7 | #include <_syslist.h> |
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| 8 | |
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| 9 | /* Some targets provides their own versions of these functions. Those |
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| 10 | targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */ |
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| 11 | |
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| 12 | #ifdef _REENT_ONLY |
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| 13 | #ifndef REENTRANT_SYSCALLS_PROVIDED |
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| 14 | #define REENTRANT_SYSCALLS_PROVIDED |
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| 15 | #endif |
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| 16 | #endif |
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| 17 | |
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| 18 | /* If NO_EXEC is defined, we don't need these functions. */ |
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| 19 | |
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| 20 | #if defined (REENTRANT_SYSCALLS_PROVIDED) || defined (NO_EXEC) |
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| 21 | |
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| 22 | int _dummy_exec_syscalls = 1; |
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| 23 | |
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| 24 | #else |
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| 25 | |
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| 26 | /* We use the errno variable used by the system dependent layer. */ |
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| 27 | #undef errno |
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| 28 | extern int errno; |
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| 29 | |
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| 30 | /* |
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| 31 | FUNCTION |
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| 32 | <<_execve_r>>---Reentrant version of execve |
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| 33 | INDEX |
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| 34 | _execve_r |
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| 35 | |
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| 36 | SYNOPSIS |
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| 37 | #include <reent.h> |
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| 38 | int _execve_r(struct _reent *<[ptr]>, const char *<[name]>, |
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| 39 | char *const <[argv]>[], char *const <[env]>[]); |
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| 40 | |
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| 41 | DESCRIPTION |
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| 42 | This is a reentrant version of <<execve>>. It |
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| 43 | takes a pointer to the global data block, which holds |
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| 44 | <<errno>>. |
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| 45 | */ |
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| 46 | |
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| 47 | int |
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| 48 | _execve_r (struct _reent *ptr, |
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| 49 | const char *name, |
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| 50 | char *const argv[], |
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| 51 | char *const env[]) |
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| 52 | { |
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| 53 | int ret; |
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| 54 | |
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| 55 | errno = 0; |
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| 56 | if ((ret = _execve (name, argv, env)) == -1 && errno != 0) |
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| 57 | ptr->_errno = errno; |
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| 58 | return ret; |
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| 59 | } |
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| 60 | |
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| 61 | |
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| 62 | /* |
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| 63 | NEWPAGE |
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| 64 | FUNCTION |
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| 65 | <<_fork_r>>---Reentrant version of fork |
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| 66 | |
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| 67 | INDEX |
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| 68 | _fork_r |
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| 69 | |
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| 70 | SYNOPSIS |
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| 71 | #include <reent.h> |
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| 72 | int _fork_r(struct _reent *<[ptr]>); |
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| 73 | |
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| 74 | DESCRIPTION |
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| 75 | This is a reentrant version of <<fork>>. It |
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| 76 | takes a pointer to the global data block, which holds |
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| 77 | <<errno>>. |
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| 78 | */ |
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| 79 | |
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| 80 | #ifndef NO_FORK |
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| 81 | |
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| 82 | int |
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| 83 | _fork_r (struct _reent *ptr) |
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| 84 | { |
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| 85 | int ret; |
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| 86 | |
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| 87 | errno = 0; |
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| 88 | if ((ret = _fork ()) == -1 && errno != 0) |
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| 89 | ptr->_errno = errno; |
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| 90 | return ret; |
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| 91 | } |
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| 92 | |
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| 93 | #endif |
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| 94 | |
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| 95 | /* |
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| 96 | NEWPAGE |
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| 97 | FUNCTION |
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| 98 | <<_wait_r>>---Reentrant version of wait |
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| 99 | |
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| 100 | INDEX |
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| 101 | _wait_r |
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| 102 | |
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| 103 | SYNOPSIS |
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| 104 | #include <reent.h> |
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| 105 | int _wait_r(struct _reent *<[ptr]>, int *<[status]>); |
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| 106 | |
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| 107 | DESCRIPTION |
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| 108 | This is a reentrant version of <<wait>>. It |
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| 109 | takes a pointer to the global data block, which holds |
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| 110 | <<errno>>. |
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| 111 | */ |
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| 112 | |
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| 113 | int |
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| 114 | _wait_r (struct _reent *ptr, |
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| 115 | int *status) |
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| 116 | { |
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| 117 | int ret; |
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| 118 | |
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| 119 | errno = 0; |
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| 120 | if ((ret = _wait (status)) == -1 && errno != 0) |
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| 121 | ptr->_errno = errno; |
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| 122 | return ret; |
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| 123 | } |
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| 124 | |
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| 125 | #endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */ |
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